Vintage Rosette Statement Necklace

Such a pretty piece. Good condition. Costume piece. It’s a Sea foam / mint green blue color. Slightly more green than Tiffany blue. One of the Rosettes has a small chip on one petal, but it’s hardly noticeable. I thought these might be bake lite but I noticed it’s white on the inside so I’m not sure what synthetic material it is. Possibly ceramic but maybe a light plastic mold. Very unique to that era